Ice-cream freezer.



L. S. PFOUTS.

ICE CREAM FREEZER.

APPLICATION FILED mum, 1907.

Patented Apr. 25, 1911.

2 SHEETSSHEET 1 L. S. PFOUTS.

ICE CREAM FREEZER.

APPLICATION FILED JUNE 4, 1907.

Patented Apr. 25, 1911.

2 SHEETS-SHEET 2.

LEROY S. PFOUTS, OF CANTON, OHIO, ASSIG'NOR TO THE'MILLER PASTEUB-IZINGMA- CHINE COMPANY, OF CANTON, OHIO, A CORPORATION OF NEW JERSEY.

ICE-CREAM FREEZER.

Specification of Letters I atent.

Patented Apr. 25, 1911.

To all whom it may concern:

Be it known that I, LEROY S. PFoU'rs, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented certain new and useful Improvements in Ice-Cream Freezers, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

This invention relates to improvements in ice cream freezers.

It pertains particularly to that class of freezers in which the freezingcylinder is arranged horizontally, is cooled by'brine, and is providedwith agitating mechanism having an element adapted to discharge or ejectthe mixture treated through a dis charge opening at one end of thecylinder.

Figure 1 is a side elevation of an ice cream freezer embodying myimprovements. Fig. 2 is a rear end view of the same. Fig. 3 is a frontview of the discharge end of the cylinder. Fig. 4 is a central verticalsection of the discharge end of the cylinder. Fig. 5 is a plan view ofthe means for holding the head at the discharge end of the cylinder inengagement therewith, part of the head and cylinder being shown insection. Fig. 6 shows details of the valve-operating connection. Fig. 7illustrates a different construction of head for the rear end of thefreezer from the construction illustrated in Figs. 1 and 2. Fig. 8 is aperspective view of the whipping, beating, agitating and propellingmechanism.

In the drawings, 1 indicates as an entirety a table or platformconstructed of any suitable material, having a horizontally disposed topplate 2 upon which a freezing cylinder 3 is held in a horizontalposition. 3 indicates the freezing chamber within said cylinder.

4 represents as an entirety a helical passageway for brine surroundingthe freezing cylinder 3, 5 a suitable insulating material surroundingsaid brine coil, and 6 an exte-- rior metal jacket. For the purpose ofsimplifying the description hereafter, the cylinder 3 and the jacketssurrounding it, as an entirety, are referred to as the freezing cylinderof the apparatus. The inlet and outlet ports for the brine-circulatingcoil or passage may be arranged as desired; in

the drawing 4' indicates the brine inlet and 4 the brine outlet.

7 is a head for the rear end of the freezing cylinder. At its center ithas a rear wardl Y extending hollow boss 7 carrying a stu ng box 7. 8 isan inlet opening through the said head, preferably arranged above thecenter thereof, and having a duct 8 leading upwardly from it through aprojection 9 carried by the said head, and preferably formed integralwith it. This inlet duct 8 terminates at its upper end in a horizontallydisposed port 8. The head 7 may be supported upon the frame 1 in anysuitable manner. In the construction shown in the drawings 7*, 7", arehorizontally disposed rearwardly extending lugs carried by the head anddetachably secured to a laterally extending rib 2 carried by the topplate 2 of the frame.

At its front end the freezing cylinder 3 has secured to it a ring orannular member of metal 10 having a downward extension 10, which, at itslower end, is detachably secured to the front end of the top plate 2 ofthe frame. This ring 10 has a forward annular extension 10*, the frontend of which is beveled as indicated at 10 11 indicates as an entiretythe front end or head for the freezing cylinder. It carries a rearwardlyextending annular flange or collar 11, provided with a beveled annularseat 11 adapted to engage with the beveled edge 10 on the ring 10 toform a fluid tight joint. The ring 10 carries at either side laterallyprojecting lugs 12.

13, 13, are brackets or cam catches recessed at 13' to receive theadjacent lug 12. 13 are screws or bolts detachably securing saidbrackets to said lugs. The front end of each bracket or cam catch isturned inwardly toward the axis of the cylinder as indicated at 13 andthese inwardly turned extensions carry rearwardly extending lugs 13.

14, 14, are pockets, carried by the head 11, preferably two in number,one arranged at eitherside of said head. The walls of said pockets arepreferably formed integrally with the head. 15, 15, are cams arranged insaid pockets 14, 14, respectively. The outermost wall 15 of each ofthese cams is adapted to engage with thelug 3 on the adjacent cam catch13. Each of these cams is rigidly secured toa shaft 16, suitably mountedat its rear end in the adjacent Wall of the head 11, extending throughsaid cam and through a suitable opening in the front wall of the pocketin which the cam is mounted, and carrying at its front end an operatinghandle 16. The distance of each cam face l5 -from the rear wall of thepocket containing said cam, increases gradually from the outer end ofthe cam inwardly, so that as the cam is rotated against the adjacent lug13, the beveled seat 11 on head 11 is forced tightly against thecooperating beveled sur-'- face 10 on the ring 10. v

17 is an outlet duct extending through the head 11 near the bottomthereof, in line With the bottom of the freezing chamber 3. 18 is a.gate or valve for controlling said discharge opening. It is suitablymounted on the head '11, preferably by means of a I pivot 18.

20 is a cap pivoted at 21 to the front wall of the duct 19, and adaptedto completely. close port 19.

22 is abatch or mixture receptacle, or tank,

of any desired kind, suitably mounted upon for the freezin the jacket 6of the freezing cylinder, or otherwise-supported above the freezingcylinder. At its lower rear cornerit' has a discharge opening 23,communicating with a duct 24. The flow of mixture through this duct 24into the inlet 8' may be controlled by any suitable valve mechanism. Ihave shown arranged in said duct 24 a rotary hollow -valve 25, the lowerend of which is inserted in the upper end of the inlet duct 8 cylinder.'25 is a portthrough the wal of said valve.'

26 is an arm or lever having one end secured to the upper end of thevalve 25. v

27 is a rod extending longitudinally at one side of the tank 22 andmounted loosely in suitable bearings 27', 27 carried by said tank, so asto be free tolreciprocate longitudinally.

28 is a link pivotally connected at its front end to the rear end of therod 27, and at its rear end to the outermost end of the lever 26.

29 is a handle'at the front end of the rod 27 to facilitate in theoperation of said rod;

The material-whippmg, beat-ing, agitating and propelling mechanismwithin the freezing chamber 3 may be of any suitable and Well knownkind, which, besides being capable of imparting the necessary-agitationa longitudinally disposed, spirally twisted blade 31 arranged to operateclosely adjacent to the inner wall of the freezing cylinder and suitablyconnected at one end to a hollow shaft 32 which extends rearwardlythrough the bearing boss 7 on the rear head 7 33 is a shaft disposedaxially within said freezing chamber, mountedat its front end in abearing 33' carried by the front head 11, and having its rear endextending through the hollow shaft. 32.

34 indicates radially disposed blades or beaters suitably arranged uponthe shaft 33.

35 is a gear box secured upon the bed plate 2 near the rear end thereof,and having a chamber 35 in which the driving gears for the inner andouter parts of the dasher mechanism within the freezing chamber arelocated. The shaft 33 extends through the gear box 35, is mounted in abearing in the rear end thereof, and has splined to it a bevel gear 37.The shaft 32 extends into the gear box 35 and has splined to it a gearwheel 38, reversely positioned on sand shaft 32 to the positioning ofthe gear 37 on the shaft 33.

39 is a bevel gear meshing with the bevel gears 37 and 38. It is securedto the mner end of a horizontally disposed shaft 40, which extendslaterally through a bearing in the gear box 35 and has its outer endmounted in a bearing 41 carried by an upwardly extending arm 42, whichis rigidly secured at its lower end to frame 1.

43 and 44 are .belt pulleys, the former mounted loosely upon and thelatter rigidly secured to the drive shaft 40.

.45 is a suitable cover for the gear box 35.

Inorder to fill the freezing cylinder with the mixture to be treated,the same:having been first poured into the receiving tank 22, theoperator standing at the front end of the machine turns the cap 20 toestablish communication through the vent 19 between the interior of thefreezing chamber 3 and the outside air, it being understood that thedischarge port 17 is closed by the discharge valve 18 atthis time. 'Hethen grasps the handle 29 on the rod 27 and pulls it for ward, therebyopening the valve 25 and permitting the mixture in the tank 22 to flowdownward under the action of gravity into the freezing chamber 3.Heretofqire, none of the horizontal ice cream freezers jof which 'Iamawardhave been provided with a suitable vent supplemental-to thematerial inlet and discharge openings to prevent backward rush orpressure of the air in the freezing chamber through the inlet openingtherein.

In fact, considerable diliiculty has been experienced in endeavoring torapidly fill horizontal freezing. chambers in this class of apparatusbecause of the back rush of air from the freezing chamber at the timewhen the mixture was being directed into it. lVith my improvedconstruction, by providing a vent for the freezing chamber in the mannerherein described, I have avoided all the diffr culties heretoforeincident to the rapid filling of the freezing chamber with the mixtureto be treated.

\Vhile in the drawings I have shown the rent at the front end of thefreezing cylinder, it will be understood, it may be applied elsewherealong the top of the cylinder, front or rear, as desired.

The mechanism for permitting the control, from the front end of thecylinder, of the valve controlling the introduction of mixture to therear end thereof, is of particular value; in the rapid operation of afreezer of the type herein shown, as it preeludes the necessity ofreaching to.the rear of the freezing cylinder in order to control saidvalve.

In the modification of rear end or head for a freezer of the type hereinshown, illustrated in Fig. 7, the only change in construction over therear head 7 above described, is in the addition of an inlet duct forfruit, or other substance, which it may be desired to introduce into thefreezing cylinder at any time during the operation of the freezer upon.a batch of material in the freezing chamber. 46 indicates such a duct,the walls of which are preferably formed integrally with the head 7.This duct has a horizontally disposed port 46 to receive the fruit orother substance, and a duct 46 leading into the freezing chamber 3. a7is a cover or cap for the port 46, it being piv-.

otally connected at 4:7 to a wall of' duct 46.

The beveled annular engaging surfaces between the front head 11 and thecylinder ring 10 are capable of being readily ground to insure a liquidtight joint, this construction affording a very simple and perfectclosure for the front end of the freezing cylinder.

The gear case 35 may be filled with a suitable amount of lubricant,insuring that the gears in the case will be thoroughly lubricated.

Where a rear freezer head of the con struction shown in Fig. 7 isemployed, the vent-19 in the front head of the cylinder may be dispensedwith, as the duct 46* and gate 47 will perform the same functions as theduct 19 and cap 20.

lVhat I claim is 1. In an ice cream freezer, the combination of a.horizontally disposed freezing cylinder. a head at the rear end thereofformed with an inlet opening a head at the opposite &

end thereof formed with a discharge opening, near the bottom of thehead, a feed duct communicating at one end with said inlet opening forthe freezing cylinder, a valve to control the flow of materialthroughsaid duct, and means for actuating said valve, operable from the frontend of said freezing cylinder.

2. In an ice cream freezer, the combination of a horizontally disposedfreezingcylinder, a head at the rear end thereof formed with an inletopening, a head at the opposite end thereof formed with a dischargeopening near the bottom of the head, a valve to control said dischargeopening, a filling .receptacle arranged above said freezing. cylinder, aduct communicating at one end with said receptacle, and at its other endwith said inlet opening for the freezing cylinder, a valve to controlthe flow of material through said duct, means for actuating said valve,operable from the front end of said. freezing cylinder, and a dasher insaid freezing cylinder. 1

3. In an ice cream freezer, the combination of a horizontally disposedfreezing cylinder, a head at the rear end thereof formed with an inletopening, a head at the opp0 site end thereof formed with a dischargeopening near the bottom of the head, a valve to control said dischargeopening, a filling receptacle arranged above said freezing cylinder, aduct communicating at one end with said receptacle, and at its other endwith said inlet opening for the freezing cylinder, a valve to controlthe flow of material through said duct, means for operating said valveincluding a hand operable device located at the front end of saidfreezing cylinder, and suitable connection between said device and saidvalve.

4. In an ice cream freezer, the combination of a horizontally disposedfreezing cylinder, a head at the rear end thereof formed with an inletopening, a head at the opposite end thereof formed with a dischargeopening near the bottom of the head, a valve to control said dischargeopening, a filling receptacle arranged above said freezing cylinder, aduct communicating at one end with said receptacle, and at its other endwith said inlet opening for the freezing cylinder, a valve to controlthe flow of material through said duct, and'a reciprocatable rodsuitably connected at its rear end to said valve and having its frontend arranged at the front end of said freezing cylinder.

5. In an ice cream freezer, the combination of a freezing cylinderhaving a beveled annular surface at the front end thereof, a head forthe rear end of said cylinder suitably secured thereto, and a headdetachably mounted on the front end of said freezing cylinder and havinga beveled annular seat adapted to engage said beveled annular surface atthe front end of the freezing cylin der, and means for holding said headwith its annular seat against the said annular surface at the front endof the freezing cylinder.

6. In an ice cream freezer, the combination of a freezing cylinder, ahead for one end thereof having a discharge opening through it in linewith the inner wall of the cylinder, a valve to control said dischargeopening, a head for the other end of the cylinder having an inlet ductcommunicating at one end with the interior of the cylinder and havingits other end arranged to communicate with a source of liquid supply,and

a supplemental inlet duct also having one trolling the outer end of saidsupplemental duct, and a dasher in said cylinder.

In testimony whereof I aflix my signature, in presence of two witnesses.

LEROY S. PFOUTS'.

Witnesses:

C. C. WRIGHT, GEO. B. Prr'rs.

